Downregulation of miR-199a-5p promotes prostate adeno-carcinoma progression through loss of its inhibition of HIF-1α.

Downregulation of miR-199a-5p promotes prostate adeno-carcinoma progression through loss of its inhibition of HIF-1α.
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miR-199a-5p 的下调通过失去对 HIF-1 α 的抑制而促进前列腺腺癌进展

DOI:
10.18632/oncotarget.18315
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发表时间:
2017-10-13
期刊:
影响因子:
--
通讯作者:
Zhou Q
Zhou Q
中科院分区:
其他
文献类型:
--
作者:
Zhong J;Huang R;Su Z;Zhang M;Xu M;Gong J;Chen N;Zeng H;Chen X;Zhou Q

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缺氧诱导因子 1 α (HIF-1α) 在缺氧和常氧条件下的细胞存活中发挥着关键作用。 HIF-1α 的调节非常复杂,涉及众多分子和途径,包括 microRNA (miRNA) 的转录后调节。尽管 HIF-1α 的上调已被证明可促进前列腺癌 (PCa) 进展,但 miRNA 在前列腺癌中调节 HIF-1α 的机制尚未阐明。在这里,我们发现 miR-199a-5p 在前列腺腺癌中表达不足。 miR-199a-5p 的人工过表达通过直接靶向 HIF-1α mRNA 的 3’非翻译区 (UTR) 来减少 PCa 细胞系 PC-3 和 DU145 中的细胞增殖、运动和肿瘤血管生成,并增加细胞凋亡,从而降低 HIF-1α 水平以及 HIF-1α 反式激活的下游基因(例如 VEGF、CXCR4、BNIP3) 和 BCL-xL)。 miR-199a-HIF 调节异常可能对 PCa 发病机制和进展有显着影响。
Hypoxia-inducible factor-1 alpha (HIF-1α) plays key roles in cell survival under both hypoxia and normoxia conditions. Regulation of HIF-1α is complex and involves numerous molecules and pathways, including post-transcriptional regulation by microRNAs (miRNAs). Although upregulation of HIF-1α has been shown to promote prostate adenocarcinoma (PCa) progression, the mechanism by which miRNAs modulate HIF-1α in prostate cancer has not been clarified. Here, we show that miR-199a-5p is underexpressed in prostate adenocarcinoma. Artificial overexpression of miR-199a-5p decreased cell proliferation, motility, and tumor angiogenesis and increased apoptosis in PCa cell liness PC-3 and DU145 by directly targeting the 3’-untranslated region (UTR) of HIF-1α mRNA, which reduced HIF-1α levels as well as downstream genes transactivated by HIF-1α (such as VEGF, CXCR4, BNIP3 and BCL-xL). Abnormalities of miR-199a-HIF regulation may contribute significantly to PCa pathogenesis and progression.
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